The self-excited vibration, called chatter, is one of the main limitations in metal removal
processes. Chatter may spoil the surface of the part and can also cause large reduction in …

Intelligent spindles are core components of the next-generation of intelligent/smart machine
tools in the Industry 4.0 Era. The purpose of this paper is to clarify the concept of intelligent …

This book presents the recently introduced and already widely referred semi-discretization
method for the stability analysis of delayed dynamical systems. Delay differential equations …

Semi-discretization techniques of periodic delayed systems are presented using zeroth-, first-
and higher-order approximations of the delayed term. It is shown that if the time-periodic …

Regenerative chatter is a self-excited vibration that can occur during milling and other
machining processes. It leads to a poor surface finish, premature tool wear, and potential …

Spindle speed variation is a well-known technique to suppress regenerative machine tool
vibrations, but it is usually considered to be effective only for low spindle speeds. In this …

Stability of a two degrees of freedom model of the turning process is considered. An
accurate modeling of the surface regeneration shows that the regenerative delay …

It is a rule of thumb that time delay tends to destabilize any dynamical system. This is not
true, however, in the case of delayed oscillators, which serve as mechanical models for …

Chatter is an instability phenomenon in machining processes which limits productivity and
results in inferior workpiece quality, noise and rapid tool wear. The increasing demand for …

In cutting process, chatter is an inevitable phenomenon that greatly affects workpiece
surface quality, tool life and machining efficiency. The stiffness variation (SV) method has …